Lubricator for rock drills



Nov. 27, 1928. Q 1,693,203

A. H. KATTERJOHN I LUBRICATOR FOR ROCK DRILLS Nov. 27, 1928. 1,693,203

A. H. KATTERJOHN LUBRICATOR FOR ROCK DRILLS Filed April 17, 1923 3Sheets-Sheet 2 Nov. 27, 1928. 1,693,203

A. H. KATTERJOHN LUBRICATOR FOR ROCK DRILLS Filed April 17, 1923 sSheets-Sheet 3 Patented Nov. 27, 1 928.

UNITED STATES AUGUST H. KATTERJOHN, DENVER, COLORADO, ASSIGNOR, BY MESNEASSIGN- MENTS, TO THE GARDNER-DENVER TION OF DELAWARE.

COMPANY, OF QUINCY, ILLINOIS, A CORPORA- LUBRICATOR FOR ROCK DRILLS.

' Application filed April 17,1923. Serial No. 632,779.

The present invention relates to means for lubricating the variousmoving parts of rock drills, and the object is to provide a mechanismwhich will properly distribute the neoessary amount of lubricantthroughout the machine and to the parts subjectto wear, said mechanismavoiding excessive supply, and consequent waste of the lubricant.

In the accompanying drawings Figure 1 is a longitudinal sectional viewthrough a rock drill equipped with the lubricator,

Figure 2 is a sectional view on the line 22 of Figure 1,

Figure 3 is a detail sectional view of the throttle and distributingvalves,

Figure 4 is a longitudinal sectional view through thethrottle valve andtaken on the line 44 of Figure 3,

Figures 5, 6 and 7 are cross sectional views taken respectively on theline 55, 6-6 and 7'7 of Figure 4, V,

Figure 8 is a detail sectional view on the line 8-8 of Figure 1 andFigure 2,

Figure 9 is a cross sectional View substantially on the line 9-9 ofFigure 1.

' In theembodiment disclosed, a drill actu-.

ating motor is provided, consisting of a cylinder member 10 containing apiston chamber 11, in which a reciprocatory piston 12 is located. Thefront end of the cylinder member is in the form of amounting designatedgenerally by the reference numeral 13, and.

containing a rotatable drill-steel receiving .35 chuck 14 that may be ofany well known character. This chuck is rotated in a wellknown manner bymeans of a motor, mounted on the front end of the cylinder member, thecasing of which is shown at 15, said motor driving a worm shaft 16geared, as shown at 17 I to the chuck. I

Expansible motive fluid, such as air, is

supplied to the chuck or drill actuating motor through a suitablecoupling element 1 8 on the rear end of the cylinder member. Thiscoupling element is located at one end of a tapered valve seat 19,inwhich 18 located a rotatable tapered throttle valve 20. The valve ischambered, asshown at 21, and has an open end at the coupling. Apassageway 22, leading from the tapered valve 19, is in communicationwith a distributing valve cage 23 containing an automatic reciprocatorydistributing valve 24 that governs the passage of the fluid to thepiston chamber 11 on opposite sides of the piston 12, for the purpose ofreciprocating the same in a manner well known to those skilled in theart. Communication between the motive fluid and the passageway 22 iscontrolled by the throttle valve 20, which has a lateral port 25 openinginto its interior chamber 21 and movable into and out of communicationwith the passageway 22.

The supply to the chuck rotating motor 15 is directed bya conduit 26,indicated in Figures 1 and 2, and a portion of which is illustrated inFigure 5. Communication between the motive fluid supply and the conduit26 is controlled by the rotary throttle valve 20, which has a port 27movable into and out of register with the conduit 26 and opening intothe interior chamber 21 of said valve.

So far as thus described, the structure is intended to be typical ofrock drills, and no claims are herein made thereto, the inventionresiding in the means for as hereinafter described.

Formed in'one side of the cylinder member 10 is a longitudinallydisposed elongated lubricant reservoir 28, having a fillingniplubricating a drill 'ple 29 closed by a plug 30. A single combinedmotive fluid supply and lubricant outlet passageway 31 is provided,having a port 32 at its inner end opening into a valve chamber 33 formedat one slde of the reservoir.

Spaced ports 34, located on opposite sides of the port 32, extend fromthe same end of the valve chamber 33 to the lubricant reservoir, oneopening into the lower portion of said reservoir, the other into theupper portion thereof, as illustrated in Figure 1. The rear end of thepassageway 31 has a transverse portion 35 communicating with a port 36that opens into the throttle valve chamber 19, as'illustrated in Figures4 and 5. The throttle valve 20 has a longitudinal channel 37 in one sidethat is movable into and out of communication with the port 36, and aport 38 in said valve and opening into the interior chamber 21,communicates with the channel 37. By comparing Figures 4, 5, 6 and'Z, 1t

-will be noted that when the throttle valve 20 is open, or in otherwords, when the main supply port 25 is in communication with thepassageway 22, leading to the drill actuating motor and the port 27 isin communication with the conduit 26 leading to the drill rotat ing.motor, so that motive fluid is being supplied tothese motors foroperating them,the

channel 37 is in communication with the port 36 and consequently fluidunder pressure will traverse the passageway 35 and 31, so that 2 ;In theoperation of the drill,rhowever, a

material amount of vibration, takes place,

and as a consequence the ball valve 39 is rocked laterally on its-seatso that the port 32 is considerably open. This vibration also seems tocause the oil in the reservoir 28 to be churned and practicallyvaporized. Moreover a pulsation of motive fluid is created in theinternal chamber 21 of the throttle valve. This pulsation evidentlyoccurs also in the passage 3635 and 31, .so that the vaporized oilcarried by the air, finds its way back through the saidpassageway andthrough the channel 37and port 38 until it enters the airstream, flowinginto the motor. This delivery, it will be observed, takes place inadvance of the branches 22 and 26 of the main supply leading totherespective motors, so that the air flowing to said motors carries thelubricant with it, and such lubricant is distributed over theworkingparts. V I

. Inorde'r to lubricate the rotating chuck 14 and the gearing 16 and 17,a passageway 42 opensinto the rearend of the chuck chamberandcommunicates at its rear end through a port 43 with one end end of avalve cham- 'ber 44. This valve'chamber has'a port 45 opening into theend of the lubricant reservoirQ A, ball valve 46 normally seated over-.the port 43 andheld by a spring 47, willobviously be vibrated bythe'longitudinal vif bration of the motor,'so that a modicum of thevaporized oil will be permitted to pass to the chuck chamber and will bedistributed over the bearing portions thereof and on the gearing.

The drillabove described, and as shown in Figure 9 is mounted to slidein a guide shell 48, said motor having slide flanges 49 operating inguideways 50 in a manner well understood. This motor is moved in theusual .manner by a screw 51 and the main exhaust port from the pistonchamber 11 is in the Lesaaoe cated. liloreover the exhaust will preventthe iCcli-llllllntlOllCf dirt and grit upon the screw. In that thisexhaust will not pass rearwardly prove "an objection to he operator, ofthe drill behind the same, a ransverse shield flange 54 is carried bythe motor in rear of the exhaust port 52, and substantially lills thespace within the shell 48 below. the motor. a V

From the foregoing, it is thought that the construction, operation andmany advantages of the .hereindescribed invention will be apparent tothose skilled in the art, without further description, and it will beunderstood that various changes in the size, shape, proportion and minordetails of construction may be resorted to without departing from thespirit or sacrificing any of the advantages oi the invention. I

Having thus fully described my invention, what claim as new, and desireto secure by 'lletters Patent,-is:- e r l. in a'lubricating system, thecombination with a vibratory motor or" arlubricant reservoir thatvibrates with. the motor, ainotive fluid supplymeans for the. motor, apassageway for admitting fluid to the reservoirQand permittingthepassageol lubricant from the reservoir, a valve chamberWlilll'WlllCll the passageway, communicates, a plurality of )ortsbetween thevalve chamber and differnt portions of the reservoir, a valvenormally losing off the communicationbetween the iassag'eivay and,chamber, and means for ieldingly holding the check valve in its posiionto close the port. I 1

2. In a lubricating system, thecombination with a vibratory motor, or" alubricant reservoir that vibrates with the motor, afmotive fluid supplymeans for the motor, a passagew leading lronrthe motive fluidsupply tothe reservoir forv admitting fluid to the reser; .vo r, and

permitting the-passage o f lubric from the reservoir, a valve chamberwith which the passageway communicates, spaced ports between the valvechamber and the upper and lower portions of the reservoir and located onopposite sides of said communica tion, and valvein the chamber normallyclosing oil the saidcommunication.

In a-lubricating system thecombina- "tion witha vibratory motorcomprising a 7 cylinder member having a piston chamber and a pistontherein, of a motive fluid supply passageway leading from the motivefluid supply to the reservoir, communicating with the piston chamber, arotary throttle valve controlling the passageway, a lubricant reseiwvoir, a fluid supply and lubricant outlet passageway opening into themotive fluid supply passageway through the throttle valve and controlledby the latter, a valve chamber with which said second passagewaycommunicates, said chamber having communication with both the upper andlower portions of the lubricant reservoir, and a check valve movablymounted in the chamber and controlling the communication of said secondpassageway only therewith, said valve being vibrated from its seat withthe vibration of the motor.

4. In a lubricating system, the combination with a vibratory motor and alubricant reservoir, ofmeans for establishing communication between thetwo, comprising a chamber vibrated by the motor, a passageway betweenthe motor and reservoir, a valve in said chamber controlling suchpassageway and vibrated from its seat by the vibration of the motor, anda plurality of open ports between the chamber and the upper and lowerportions of the reservoir.

In testimony whereof, I afiix my signature.

AUGUST H. KATTERJOHN.

